Trip-guard.



W. J. PARROTT.

TRIP GUARD. APPLICATION FILED 133.14. 1908.

Patented Mar. 16, 1909.

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W. J.. PARROTT.

TRIPGUARD. V 5, 1 QPLIOATIOH run run, 1908. Patented Mar. 16 1909.

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i" l" I" WU Pat-r011 Wit" on WILLIAM J. PARROTT, OF ST. EDWARD,NEBRASKA.

TRIP-GUARD Specification of Letters Patent.

Patented March 16, 1909.

Application filed February 14, 1908. Serial No. 415,946.

To all whom it may concern:

Be it known that I, WILLIAM J. PARROTT, a citizen of the United States,residing at St. Edward, in the county of Boone, State of Nebraska, haveinvented certain new anduseful Improvements in Trip-Guards; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention relates to trip guards for binders.

In cutting grain in a stubble field, it very frequently happens that oldstalks are speared by the points of the guard and are carried along bythe machine felling the grain in their path and preventing its beingout. In carrying out my invention I provide a guard tooth having apivoted point and the points upon all of the guard teeth of the binderare adapted to be imultaneously rocked in a downward and rearwarddirection by the depression of a foot lever this being done by theoperator of the binder as soon as he perceives a stalk speared upon anyof the teeth. When so rocked, the points will lower the stalks into thestubble and as a consequence, the stalk is drawn off from the tooth bythe resistance of the stubble, the points being returned immediately totheir normal position by means of a spring.

In the accompanying drawings, Figure 1 is a top plan view of theplatform of a binder showing the application of my invention, Fig. 2 isa side elevation thereof, Fig. 3 is a detail top plan view of a portionof the binder platform showing but one of the teeth, Fig. 4 is avertical sectional view through one of the teeth and a portion of theplatform showing in full lines the normal position of the point of thetooth and in dotted lines its position when moved or tripped todischarge the stalk, Fig. 5 is a fragmentary bottom plan view, Fig. 6 isa detail vertical transverse sectional view through the tooth on theline a-a of Fig. 4, Fig. 7 is a similar view on the line 6-1; of Fig. 4,Fig. 8 is a similar view on the line cc of the same figure, and, Fig. 9is a detail perspective view of the point of one of the teeth.

In the drawings, there is shown the latform 10 of a binder the remaindero the machine not being shown as it relates in no way to the invention.Bolted to the under side of the platform 10 at the forward edge thereofand at the blocks 11 which have their faces which are proper intervalsare guide disposed against the under side of the platform recessed as at12 for a purpose which will presently be made apparent and these blocksare formed at their. forward edges each with an upstanding projection 13to which is bolted a plate 14 this plate being extended throughout thelength of the front edge of the platform 10 and being formed with aforwardly extending horizontal flange 15 to which are bolted, at theproper intervals the guard teeth 16 of the machine. It will be well tostate at this point that the guard teeth include each the usualrearwardly extending finger 17 the knife bar being indicated by thenumeral 18 and having secured to it the usual blades 19 whichreciprocate beneath the overhanging rearwardly extending finger 17oftheir respective guard teeth. 7

Each of the guard teeth 16 is formed at its forward end with an ear 20which is pivotally received between cars 21 formed by recessing thepoint of each tooth, these points being indicated by the numeral 22.These tooth points are of the cross sectional contour illustrated inFigs. 6, 7 and 8 of the drawings the recess in the point being indicatedby the numeral 23. This recess in each tooth point is formed in theunder side of the point and to the rear and its formation results ina'shoulder 24 which, when the point is elevated, abuts a ainst theupperside of the forward endof t e body of the tooth and limits the pivotalmovement of the point in an upward direction. It will be understood ofcourse that the tooth point may have a downward swinging movement and inorder that all of the points may be simultaneously swung in this manner,the forward end of an arm 25 is pivoted as at 26 in the recess formed inthe point of each tooth this pivotal point 26 being located, when thetooth point is raised, in a plane forwardly but below the pivotal pointfor the point itself. These arms 25 are extended rearwardly in adownward direction from their ivots 26 and have their rear portionsexten ed directly rearwardly in a plane parallel to the plane of theplatform 10 and each arm has its rear end pivotally received betweenears 27 formed upon the forward edge of a retracting bar 28 whichextends longitudinally beneath the latform 10 and is supported and-workswit in the recesses 12 in the guide blocks 11.

J ournaled in suitable bearing brackets 29 at the rear edge of theplatform 10 is a rock shaft 30 which is squared and fixed upon thisshaft and depending therefrom are crank arms 31 the lower ends of whichare ivoted by means of a sliding pivot 32, to the rear ends of bars 33these bars being connected at their forward ends as at 34 to theretracting bar 28. The bars 33 are of course located beneath theplatform 10 and they work in suit able guides 35. A spring 36 is securedat one end to the rock shaft 30, upon which it is engaged, and at itsother end is connected to one of the bearing brackets 29 and this springexerts its tension in adirection to hold the retracting bar 28 at thelimit of its forward movement. Fixed upon the shaft 30 at its inner endis a crank arm 37 the end of which is pivotally connected to the lowerend of a rod 38 this rod being connected at its upper end to one end ofa rocking foot lever 39 mounted at a convenient point upon the frame ofthe binder.

Should it be observed, during the operation of the binder that a stalkhas been speared upon one of the teeth, the operator, with his foot,rocks the lever 89 and this movement results in a rearward movement ofthe retracting bar 28 swinging the point of the .teeth downwardly asindicated in dotted lines in Fig. 4 it being understood that the stubblewill pull the stalk from the tooth. The foot lever is then released andthe spring 36 acts to return the points to their norma position.

While the present invention has been shown in connection with anordinary binder it will be understood that it may be employed inconnection with any specific implement to which it is adapted, such as aheader.

What is claimed is:

1. In a mechanism of the class described, the combination with aplatform, of guard teeth secured to the platform at intervals, pointspivoted to the teeth on a horizontal axis, and means for rocking saidpoints.

2. In a mechanism of the class described, the combination with aplatform, of guard teeth secured to the platform at intervals, pointspivoted to the teeth, and means for rocking said points downwardly.

3. In a mechanism of the class described, the combination with aplatform, of guard teeth secured to the platform at intervals, pointspivoted to the teeth, and means for rocking said points, each of saidpoints being formed with a shoulder which cooperates with the body ofthe tooth to limit the upward movement of the point.

4; In a mechanism of the class described, the combination with aplatform, of guard teeth secured to the platform at intervals, pointspivoted to the teeth, means for rock ing said points including aretracting bar mounted for backward and forward movement beneath theplatform, and connection between the bar and each of the points.

5. In a mechanism of the class described, the combination with aplatform, of guard teeth secured to the platform at intervals, pointspivoted to the teeth on a horizontal axis, and means for simultaneouslyrocking said points.

In testimony whereof, I afiix my signature, in presence of twowitnesses.

WILLIAM J. PARROTT.

Witnesses:

R. C. PARROTT, C. E. NELSON.

